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+import { describe, it } from "node:test";
+import assert from "node:assert";
+import { parse } from "../src/index.js";
+
+describe("wmap parser", () => {
+    describe("components", () => {
+        it("should parse a basic component", async () => {
+            const source = "Tea (0.9, 0.5)";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities.length, 1);
+            assert.strictEqual(result.entities[0].type, "component");
+            assert.strictEqual(result.entities[0].label, "Tea");
+            assert.deepStrictEqual(result.entities[0].coordinates, [0.9, 0.5]);
+            assert.strictEqual(result.entities[0].shape, null);
+        });
+
+        it("should parse a component with shape", async () => {
+            const source = "Database (0.3, 0.8) [Square]";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities.length, 1);
+            assert.strictEqual(result.entities[0].type, "component");
+            assert.strictEqual(result.entities[0].label, "Database");
+            assert.deepStrictEqual(result.entities[0].coordinates, [0.3, 0.8]);
+            assert.strictEqual(result.entities[0].shape, "square");
+        });
+
+        it("should parse component with x shape", async () => {
+            const source = "API (0.5, 0.6) [x]";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].shape, "x");
+        });
+
+        it("should parse component with triangle shape", async () => {
+            const source = "Service (0.4, 0.7) [Triangle]";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].shape, "triangle");
+        });
+
+        it("should parse component with circle shape", async () => {
+            const source = "Process (0.2, 0.9) [CIRCLE]";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].shape, "circle");
+        });
+
+        it("should handle decimal numbers", async () => {
+            const source = "Item (.5, .123)";
+            const result = await parse(source);
+
+            assert.deepStrictEqual(
+                result.entities[0].coordinates,
+                [0.5, 0.123],
+            );
+        });
+
+        it("should handle integers as coordinates", async () => {
+            const source = "Item (1, 0)";
+            const result = await parse(source);
+
+            assert.deepStrictEqual(result.entities[0].coordinates, [1, 0]);
+        });
+
+        it("should preserve case in component labels", async () => {
+            const source = "MySpecialTea (0.5, 0.5)";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].label, "MySpecialTea");
+        });
+
+        it("should handle component labels with spaces", async () => {
+            const source = "Cup of Tea (0.5, 0.5)";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].label, "Cup of Tea");
+        });
+
+        it("should handle whitespace around tokens", async () => {
+            const source = "  Tea  (  0.9  ,  0.5  )  [  Square  ]  ";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].label, "Tea");
+            assert.deepStrictEqual(result.entities[0].coordinates, [0.9, 0.5]);
+            assert.strictEqual(result.entities[0].shape, "square");
+        });
+    });
+
+    describe("dependencies (edges)", () => {
+        it("should parse undirected dependency", async () => {
+            const source = "Tea -- Cup";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities.length, 1);
+            assert.strictEqual(result.entities[0].type, "dependency");
+            assert.strictEqual(result.entities[0].from, "Tea");
+            assert.strictEqual(result.entities[0].to, "Cup");
+            assert.strictEqual(result.entities[0].isDirected, false);
+        });
+
+        it("should parse directed dependency", async () => {
+            const source = "Tea -> Cup";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].type, "dependency");
+            assert.strictEqual(result.entities[0].from, "Tea");
+            assert.strictEqual(result.entities[0].to, "Cup");
+            assert.strictEqual(result.entities[0].isDirected, true);
+        });
+
+        it("should preserve case in dependency labels", async () => {
+            const source = "MyTea -> YourCup";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].from, "MyTea");
+            assert.strictEqual(result.entities[0].to, "YourCup");
+        });
+
+        it("should ignore whitespace in dependencies", async () => {
+            const source = "  Tea  --  Cup  ";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].from, "Tea");
+            assert.strictEqual(result.entities[0].to, "Cup");
+        });
+    });
+
+    describe("notes", () => {
+        it("should parse a note", async () => {
+            const source = "[Note] (0.5, 0.5) This is a note";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities.length, 1);
+            assert.strictEqual(result.entities[0].type, "note");
+            assert.deepStrictEqual(result.entities[0].coordinates, [0.5, 0.5]);
+            assert.strictEqual(result.entities[0].text, "This is a note");
+        });
+
+        it("should handle case insensitive note keyword", async () => {
+            const source = "[note] (0.5, 0.5) Text";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].type, "note");
+        });
+
+        it("should preserve case in note text", async () => {
+            const source = "[NOTE] (0.5, 0.5) Important NOTE";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].text, "Important NOTE");
+        });
+
+        it("should handle empty note text", async () => {
+            const source = "[Note] (0.5, 0.5) ";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].text, "");
+        });
+    });
+
+    describe("stages", () => {
+        it("should parse stage I", async () => {
+            const source = "[I] 0.25";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities.length, 1);
+            assert.strictEqual(result.entities[0].type, "stage");
+            assert.strictEqual(result.entities[0].number, "i");
+            assert.strictEqual(result.entities[0].value, 0.25);
+        });
+
+        it("should parse stage II", async () => {
+            const source = "[ii] 0.5";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].number, "ii");
+            assert.strictEqual(result.entities[0].value, 0.5);
+        });
+
+        it("should parse stage III", async () => {
+            const source = "[III] 0.75";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].number, "iii");
+            assert.strictEqual(result.entities[0].value, 0.75);
+        });
+
+        it("should parse stage IV", async () => {
+            const source = "[Iv] 1.0";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].number, "iv");
+            assert.strictEqual(result.entities[0].value, 1.0);
+        });
+
+        it("should handle decimal stage values", async () => {
+            const source = "[I] .333";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].value, 0.333);
+        });
+    });
+
+    describe("groups", () => {
+        it("should parse a group with single component", async () => {
+            const source = "[Group] Tea";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities.length, 1);
+            assert.strictEqual(result.entities[0].type, "group");
+            assert.deepStrictEqual(result.entities[0].vertices, ["Tea"]);
+        });
+
+        it("should parse a group with multiple components", async () => {
+            const source = "[Group] Tea, Cup, Kettle";
+            const result = await parse(source);
+
+            assert.deepStrictEqual(result.entities[0].vertices, [
+                "Tea",
+                "Cup",
+                "Kettle",
+            ]);
+        });
+
+        it("should handle case insensitive group keyword", async () => {
+            const source = "[group] Tea, Cup";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].type, "group");
+        });
+
+        it("should preserve case in group component labels", async () => {
+            const source = "[GROUP] MyTea, YourCup";
+            const result = await parse(source);
+
+            assert.deepStrictEqual(result.entities[0].vertices, [
+                "MyTea",
+                "YourCup",
+            ]);
+        });
+
+        it("should handle whitespace around commas", async () => {
+            const source = "[Group] Tea , Cup , Kettle";
+            const result = await parse(source);
+
+            assert.deepStrictEqual(result.entities[0].vertices, [
+                "Tea",
+                "Cup",
+                "Kettle",
+            ]);
+        });
+    });
+
+    describe("inertia", () => {
+        it("should parse inertia", async () => {
+            const source = "[Inertia] Tea";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities.length, 1);
+            assert.strictEqual(result.entities[0].type, "inertia");
+            assert.strictEqual(result.entities[0].vertex, "Tea");
+        });
+
+        it("should handle case insensitive inertia keyword", async () => {
+            const source = "[inertia] Tea";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].type, "inertia");
+        });
+
+        it("should preserve case in inertia vertex label", async () => {
+            const source = "[INERTIA] MyTea";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].vertex, "MyTea");
+        });
+    });
+
+    describe("evolution", () => {
+        it("should parse evolution with positive sign", async () => {
+            const source = "[Evolution] Tea + 0.5";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities.length, 1);
+            assert.strictEqual(result.entities[0].type, "evolution");
+            assert.strictEqual(result.entities[0].vertex, "Tea");
+            assert.strictEqual(result.entities[0].isPositive, true);
+            assert.strictEqual(result.entities[0].value, 0.5);
+        });
+
+        it("should parse evolution with negative sign", async () => {
+            const source = "[Evolution] Tea - 0.3";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].isPositive, false);
+            assert.strictEqual(result.entities[0].value, 0.3);
+        });
+
+        it("should handle case insensitive evolution keyword", async () => {
+            const source = "[evolution] Tea + 0.5";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].type, "evolution");
+        });
+
+        it("should preserve case in evolution vertex label", async () => {
+            const source = "[EVOLUTION] MyTea - 0.2";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].vertex, "MyTea");
+        });
+
+        it("should handle decimal evolution values", async () => {
+            const source = "[Evolution] Tea + .75";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities[0].value, 0.75);
+        });
+    });
+
+    describe("multiple entities", () => {
+        it("should parse multiple entities", async () => {
+            const source = `Tea (0.9, 0.5)
+Cup (0.8, 0.4)
+Tea -> Cup`;
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities.length, 3);
+            assert.strictEqual(result.entities[0].type, "component");
+            assert.strictEqual(result.entities[1].type, "component");
+            assert.strictEqual(result.entities[2].type, "dependency");
+        });
+
+        it("should handle different line endings (LF)", async () => {
+            const source = "Tea (0.9, 0.5)\nCup (0.8, 0.4)";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities.length, 2);
+        });
+
+        it("should handle different line endings (CRLF)", async () => {
+            const source = "Tea (0.9, 0.5)\r\nCup (0.8, 0.4)";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities.length, 2);
+        });
+
+        it("should handle different line endings (CR)", async () => {
+            const source = "Tea (0.9, 0.5)\rCup (0.8, 0.4)";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities.length, 2);
+        });
+
+        it("should handle empty lines", async () => {
+            const source = `Tea (0.9, 0.5)
+
+Cup (0.8, 0.4)`;
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities.length, 2);
+        });
+
+        it("should ignore invalid lines", async () => {
+            const source = `Tea (0.9, 0.5)
+This is invalid
+Cup (0.8, 0.4)
+Another invalid line
+Tea -> Cup`;
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities.length, 3);
+            assert.strictEqual(result.entities[0].label, "Tea");
+            assert.strictEqual(result.entities[1].label, "Cup");
+            assert.strictEqual(result.entities[2].type, "dependency");
+        });
+    });
+
+    describe("edge cases", () => {
+        it("should handle empty input", async () => {
+            const source = "";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities.length, 0);
+        });
+
+        it("should handle only whitespace", async () => {
+            const source = "   \n  \n  ";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities.length, 0);
+        });
+
+        it("should handle only invalid lines", async () => {
+            const source = "invalid\nstill invalid";
+            const result = await parse(source);
+
+            assert.strictEqual(result.entities.length, 0);
+        });
+
+        it("should handle complex component labels", async () => {
+            const source = "My Super Complex Label 123 (0.5, 0.5)";
+            const result = await parse(source);
+
+            assert.strictEqual(
+                result.entities[0].label,
+                "My Super Complex Label 123",
+            );
+        });
+    });
+
+    describe("comprehensive example", () => {
+        it("should parse a complete wardley map", async () => {
+            const source = `[I] 0.25
+[II] 0.5
+[III] 0.75
+[IV] 1.0
+
+Tea (0.9, 0.5) [Circle]
+Cup (0.8, 0.4)
+Kettle (0.7, 0.3) [Square]
+Hot Water (0.6, 0.2)
+
+Tea -> Cup
+Cup -> Kettle
+Kettle -> Hot Water
+
+[Note] (0.5, 0.5) This is our tea supply chain
+
+[Group] Tea, Cup, Kettle
+[Inertia] Kettle
+[Evolution] Tea + 0.1`;
+
+            const result = await parse(source);
+
+            // 4 stages + 4 components + 3 dependencies + 1 note + 1 group + 1 inertia + 1 evolution = 15
+            assert.strictEqual(result.entities.length, 15);
+
+            assert.strictEqual(result.entities[0].type, "stage");
+            assert.strictEqual(result.entities[1].type, "stage");
+            assert.strictEqual(result.entities[2].type, "stage");
+            assert.strictEqual(result.entities[3].type, "stage");
+
+            assert.strictEqual(result.entities[4].type, "component");
+            assert.strictEqual(result.entities[4].label, "Tea");
+            assert.strictEqual(result.entities[4].shape, "circle");
+
+            assert.strictEqual(result.entities[8].type, "dependency");
+            assert.strictEqual(result.entities[8].from, "Tea");
+            assert.strictEqual(result.entities[8].to, "Cup");
+
+            assert.strictEqual(result.entities[11].type, "note");
+
+            assert.strictEqual(result.entities[12].type, "group");
+            assert.strictEqual(result.entities[12].vertices.length, 3);
+
+            assert.strictEqual(result.entities[13].type, "inertia");
+
+            assert.strictEqual(result.entities[14].type, "evolution");
+        });
+    });
+});