121 lines
4.4 KiB
Go
121 lines
4.4 KiB
Go
package tokenize
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import (
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"testing"
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)
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func TestMakeSplitOutput_SplitsOutputAtActiveCursorPosition(t *testing.T) {
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// Create input, accept the first rune.
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tokenAPI := NewAPI("Testing")
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r, _, _ := tokenAPI.Input.Rune.Peek(0)
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tokenAPI.Input.Rune.Accept(r) // T
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AssertEqual(t, "T", tokenAPI.Output.String(), "accepted rune in input")
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// Split
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split := tokenAPI.SplitOutput()
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AssertEqual(t, 1, tokenAPI.pointers.offset, "parent offset")
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AssertEqual(t, 1, tokenAPI.pointers.offset, "child offset")
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// Accept two runes via fork.
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r, _, _ = tokenAPI.Input.Rune.Peek(0)
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tokenAPI.Input.Rune.Accept(r) // e
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r, _, _ = tokenAPI.Input.Rune.Peek(0)
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tokenAPI.Input.Rune.Accept(r) // s
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AssertEqual(t, "es", tokenAPI.Output.String(), "result runes in split output")
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AssertEqual(t, 3, tokenAPI.pointers.offset, "offset in split output")
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// Merge split output back into main output.
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tokenAPI.MergeSplitOutput(split)
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AssertEqual(t, "Tes", tokenAPI.Output.String(), "result runes in parent Input after Merge()")
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AssertEqual(t, 3, tokenAPI.pointers.offset, "parent offset")
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}
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// func TestGivenForkedChildWhichAcceptedRune_AfterMerging_RuneEndsUpInParentResult(t *testing.T) {
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// tokenAPI := NewAPI("Testing")
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// r, _, _ := tokenAPI.Input.Rune.Peek(0)
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// tokenAPI.Input.Rune.Accept(r) // T
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// f1 := tokenAPI.Fork()
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// r, _, _ = tokenAPI.Input.Rune.Peek(0)
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// tokenAPI.Input.Rune.Accept(r) // e
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// f2 := tokenAPI.Fork()
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// r, _, _ = tokenAPI.Input.Rune.Peek(0)
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// tokenAPI.Input.Rune.Accept(r) // s
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// AssertEqual(t, "s", tokenAPI.Output.String(), "f2 String()")
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// AssertEqual(t, 3, tokenAPI.stackFrame.offset, "f2.offset A")
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// tokenAPI.Merge(f2)
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// tokenAPI.Dispose(f2)
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// AssertEqual(t, "es", tokenAPI.Output.String(), "f1 String()")
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// AssertEqual(t, 3, tokenAPI.stackFrame.offset, "f1.offset A")
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// tokenAPI.Merge(f1)
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// tokenAPI.Dispose(f1)
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// AssertEqual(t, "Tes", tokenAPI.Output.String(), "top-level API String()")
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// AssertEqual(t, 3, tokenAPI.stackFrame.offset, "f1.offset A")
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// }
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// func TestFlushInput(t *testing.T) {
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// tokenAPI := NewAPI("cool")
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// // Flushing without any read data is okay. FlushInput() will return
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// // false in this case, and nothing else happens.
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// AssertTrue(t, tokenAPI.Input.Flush() == false, "flush input at start")
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// r, _, _ := tokenAPI.Input.Rune.Peek(0)
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// tokenAPI.Input.Rune.Accept(r) // c
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// r, _, _ = tokenAPI.Input.Rune.Peek(0)
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// tokenAPI.Input.Rune.Accept(r) // o
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// AssertTrue(t, tokenAPI.Input.Flush() == true, "flush input after reading some data")
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// AssertEqual(t, 0, tokenAPI.stackFrame.offset, "offset after flush input")
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// AssertTrue(t, tokenAPI.Input.Flush() == false, "flush input after flush input")
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// // Read offset is now zero, but reading should continue after "co".
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// // The output so far isn't modified, so the following accept calls
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// // will add their runes to the already accepted string "co".
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// r, _, _ = tokenAPI.Input.Rune.Peek(0)
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// tokenAPI.Input.Rune.Accept(r) // o
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// r, _, _ = tokenAPI.Input.Rune.Peek(0)
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// tokenAPI.Input.Rune.Accept(r) // o
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// AssertEqual(t, "cool", tokenAPI.Output.String(), "end result")
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// }
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// func TestInputFlusherWrapper(t *testing.T) {
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// runeA := A.Rune('a')
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// flushB := C.FlushInput(A.Rune('b'))
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// tokenAPI := NewAPI("abaab")
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// runeA(tokenAPI)
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// AssertEqual(t, 1, tokenAPI.stackFrame.offset, "offset after 1 read")
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// AssertEqual(t, "a", tokenAPI.Output.String(), "runes after 1 read")
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// flushB(tokenAPI)
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// AssertEqual(t, 0, tokenAPI.stackFrame.offset, "offset after 2 reads + input flush")
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// AssertEqual(t, "ab", tokenAPI.Output.String(), "runes after 2 reads")
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// runeA(tokenAPI)
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// AssertEqual(t, 1, tokenAPI.stackFrame.offset, "offset after 3 reads")
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// AssertEqual(t, "aba", tokenAPI.Output.String(), "runes after 3 reads")
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// runeA(tokenAPI)
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// AssertEqual(t, 2, tokenAPI.stackFrame.offset, "offset after 4 reads")
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// AssertEqual(t, "abaa", tokenAPI.Output.String(), "runes after 4 reads")
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// flushB(tokenAPI)
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// AssertEqual(t, 0, tokenAPI.stackFrame.offset, "offset after 5 reads + input flush")
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// AssertEqual(t, "abaab", tokenAPI.Output.String(), "runes after 5 reads")
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// }
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func AssertEqual(t *testing.T, expected interface{}, actual interface{}, forWhat string) {
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if expected != actual {
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t.Errorf(
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"Unexpected value for %s:\nexpected: %q\nactual: %q",
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forWhat, expected, actual)
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}
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}
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func AssertTrue(t *testing.T, b bool, assertion string) {
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if !b {
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t.Errorf("Assertion %s is false", assertion)
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}
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}
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