131 lines
4.2 KiB
Go
131 lines
4.2 KiB
Go
package tokenize
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import (
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"testing"
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)
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// TODO FIXME
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// func TestFork_CreatesForkOfInputAtSameCursorPosition(t *testing.T) {
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// // Create input, accept the first rune.
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// i := NewAPI("Testing")
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// i.NextRune()
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// i.Accept() // T
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// AssertEqual(t, "T", i.String(), "accepted rune in input")
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// // Fork
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// child := i.Fork()
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// AssertEqual(t, 1, i.stackFrame.offset, "parent offset")
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// AssertEqual(t, 1, i.stackFrame.offset, "child offset")
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// // Accept two runes via fork.
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// i.NextRune()
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// i.Accept() // e
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// i.NextRune()
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// i.Accept() // s
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// AssertEqual(t, "es", i.String(), "result runes in fork")
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// AssertEqual(t, 1, i.stackFrames[i.stackLevel-1].offset, "parent offset")
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// AssertEqual(t, 3, i.stackFrame.offset, "child offset")
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// // Merge fork back into parent
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// i.Merge(child)
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// i.Dispose(child)
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// AssertEqual(t, "Tes", i.String(), "result runes in parent Input after Merge()")
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// AssertEqual(t, 3, i.stackFrame.offset, "parent offset")
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// }
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// TODO FIXME
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// func TestGivenForkedChildWhichAcceptedRune_AfterMerging_RuneEndsUpInParentResult(t *testing.T) {
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// i := NewAPI("Testing")
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// i.NextRune()
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// i.Accept()
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// f1 := i.Fork()
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// i.NextRune()
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// i.Accept()
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// f2 := i.Fork()
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// i.NextRune()
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// i.Accept()
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// AssertEqual(t, "s", i.String(), "f2 String()")
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// AssertEqual(t, 3, i.stackFrame.offset, "f2.offset A")
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// i.Merge(f2)
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// i.Dispose(f2)
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// AssertEqual(t, "es", i.String(), "f1 String()")
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// AssertEqual(t, 3, i.stackFrame.offset, "f1.offset A")
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// i.Merge(f1)
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// i.Dispose(f1)
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// AssertEqual(t, "Tes", i.String(), "top-level API String()")
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// AssertEqual(t, 3, i.stackFrame.offset, "f1.offset A")
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// }
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// TODO FIXME
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// func TestCallingAcceptAfterNextRune_AcceptsRuneAndMovesReadOffsetForward(t *testing.T) {
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// i := NewAPI("Testing")
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// r, _ := i.NextRune()
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// AssertEqual(t, 'T', r, "result from 1st call to NextRune()")
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// AssertTrue(t, i.lastRune == 'T', "API.lastRune after NextRune() is not 'T'")
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// AssertTrue(t, i.runeRead, "API.runeRead after NextRune() is not true")
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// i.Accept()
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// AssertTrue(t, i.runeRead == false, "API.runeRead after Accept() is not false")
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// AssertEqual(t, 1, i.stackFrame.offset, "API.stackFrame.offset")
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// r, _ = i.NextRune()
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// AssertEqual(t, 'e', r, "result from 2nd call to NextRune()")
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// }
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// TODO FIXME
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// func TestFlushInput(t *testing.T) {
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// api := 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, api.FlushInput() == false, "flush input at start")
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// api.NextRune()
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// api.Accept()
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// api.NextRune()
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// api.Accept()
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// AssertTrue(t, api.FlushInput() == true, "flush input after reading some data")
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// AssertEqual(t, 0, api.stackFrame.offset, "offset after flush input")
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// AssertTrue(t, api.FlushInput() == 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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// api.NextRune()
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// api.Accept()
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// api.NextRune()
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// api.Accept()
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// AssertEqual(t, "cool", api.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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api := NewAPI("abaab")
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runeA(api)
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AssertEqual(t, 1, api.stackFrame.offset, "offset after 1 read")
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AssertEqual(t, "a", api.String(), "runes after 1 read")
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flushB(api)
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AssertEqual(t, 0, api.stackFrame.offset, "offset after 2 reads + input flush")
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AssertEqual(t, "ab", api.String(), "runes after 2 reads")
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runeA(api)
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AssertEqual(t, 1, api.stackFrame.offset, "offset after 3 reads")
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AssertEqual(t, "aba", api.String(), "runes after 3 reads")
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runeA(api)
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AssertEqual(t, 2, api.stackFrame.offset, "offset after 4 reads")
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AssertEqual(t, "abaa", api.String(), "runes after 4 reads")
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flushB(api)
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AssertEqual(t, 0, api.stackFrame.offset, "offset after 5 reads + input flush")
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AssertEqual(t, "abaab", api.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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