Initial extraction from Norganize1.0.0

1 files changed, 71 insertions, 0 deletions

diff --git a/Tests/NorgKitTests/Helpers/TextHelperTests.swift b/Tests/NorgKitTests/Helpers/TextHelperTests.swift
new file mode 100644
index 0000000..9e236ff
--- /dev/null
+++ b/Tests/NorgKitTests/Helpers/TextHelperTests.swift
@@ -0,0 +1,71 @@
+import Testing
+
+@testable import NorgKit
+
+struct TextHelperTests {
+
+  @Test func lineSlicesSplitsOnNewlines() {
+    #expect(TextHelper.lineSlices("a\nb\nc").map(String.init) == ["a", "b", "c"])
+  }
+
+  @Test func lineSlicesKeepsTrailingEmptyLine() {
+    #expect(TextHelper.lineSlices("a\n").map(String.init) == ["a", ""])
+  }
+
+  @Test func lineSlicesHandlesEmptyString() {
+    #expect(TextHelper.lineSlices("").map(String.init) == [""])
+  }
+
+  @Test func enumerateLinesProvidesIndices() {
+    var seen: [(String, Int)] = []
+    TextHelper.enumerateLines(in: "one\ntwo") { line, index in
+      seen.append((String(line), index))
+    }
+    #expect(seen.map(\.0) == ["one", "two"])
+    #expect(seen.map(\.1) == [0, 1])
+  }
+
+  @Test func enumerateLinesStripsCarriageReturns() {
+    var lines: [String] = []
+    TextHelper.enumerateLines(in: "a\r\nb\r\n") { line, _ in lines.append(String(line)) }
+    #expect(lines == ["a", "b", ""])
+  }
+
+  @Test func lineReturnsRequestedLine() {
+    #expect(TextHelper.line(in: "a\nb\nc", at: 1).map(String.init) == "b")
+  }
+
+  @Test func lineReturnsLastLineWithoutTrailingNewline() {
+    #expect(TextHelper.line(in: "a\nb", at: 1).map(String.init) == "b")
+  }
+
+  @Test func lineStripsCarriageReturn() {
+    #expect(TextHelper.line(in: "a\r\nb", at: 0).map(String.init) == "a")
+  }
+
+  @Test func lineReturnsNilForOutOfRange() {
+    #expect(TextHelper.line(in: "a\nb", at: 5) == nil)
+  }
+
+  @Test func lineReturnsNilForNegativeIndex() {
+    #expect(TextHelper.line(in: "a", at: -1) == nil)
+  }
+
+  @Test func whitespaceTrimmedSubstringTrimsBothEnds() {
+    let trimmed = TextHelper.whitespaceTrimmed("  \t hi \t "[...])
+    #expect(trimmed == "hi")
+  }
+
+  @Test func whitespaceTrimmedSubstringOfAllWhitespaceIsEmpty() {
+    #expect(TextHelper.whitespaceTrimmed("   \t "[...]).isEmpty)
+  }
+
+  @Test func whitespaceTrimmedStringTrimsWhenNeeded() {
+    #expect(TextHelper.whitespaceTrimmed("  hi  ") == "hi")
+  }
+
+  @Test func whitespaceTrimmedStringReturnsSameValueWhenAlreadyTrimmed() {
+    let input = "already-clean"
+    #expect(TextHelper.whitespaceTrimmed(input) == input)
+  }
+}