89 lines
2.7 KiB
Go
89 lines
2.7 KiB
Go
package parser
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import (
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"testing"
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)
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func TestGeneratingStringDoesNotResetBuffer(t *testing.T) {
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var b stringBuffer
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s1, _ := b.writeString(`hi\nthere`).asInterpretedString()
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s2 := b.asLiteralString()
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if s1 != "hi\nthere" {
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t.Fatalf("Did not get expected string\"X\" for try 1, but %q", s1)
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}
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if s2 != "hi\\nthere" {
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t.Fatalf("Did not get expected string\"X\" for try 2, but %q", s2)
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}
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}
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func TestResetResetsBuffer(t *testing.T) {
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var b stringBuffer
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s := b.writeRune('X').reset().asLiteralString()
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if s != "" {
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t.Fatalf("Did not get expected empty string, but %q", s)
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}
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}
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func TestAsLiteralString(t *testing.T) {
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b := stringBuffer{}
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for _, c := range []stringbufT{
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{"empty string", ``, ``, OK},
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{"simple string", `Simple string!`, `Simple string!`, OK},
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{"single quote", `'`, `'`, OK},
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{"double quote", `"`, `"`, OK},
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{"escaped single quote", `\'`, `\'`, OK},
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{"escaped double quote", `\"`, `\"`, OK},
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{"escape anything", `\x\t\f\n\r\'\"\\`, `\x\t\f\n\r\'\"\\`, OK},
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{"UTF8 escapes", `\uceb2\U00e0b8bf`, `\uceb2\U00e0b8bf`, OK},
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{"actual newline", "on\nmultiple\nlines", "on\nmultiple\nlines", OK},
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} {
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s := b.reset().writeString(c.in).asLiteralString()
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if s != c.out {
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t.Fatalf("[%s] %q -> %q failed: actual result = %q", c.name, c.in, c.out, s)
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}
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}
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}
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func TestAsInterpretedString(t *testing.T) {
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b := stringBuffer{}
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for _, c := range []stringbufT{
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{"empty string", "", "", OK},
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{"one character", "Simple string!", "Simple string!", OK},
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{"escaped single quote", `\'`, "", FAIL},
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{"escaped double quote", `\"`, `"`, OK},
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{"bare single quote", `'`, "'", OK},
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{"string in single quotes", `'Hello'`, `'Hello'`, OK},
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{"string in escaped double quotes", `\"Hello\"`, `"Hello"`, OK},
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{"escape something", `\t\f\n\r\"\\`, "\t\f\n\r\"\\", OK},
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{"short UTF8 escapes", `\u2318Wh\u00e9\u00e9!`, `⌘Whéé!`, OK},
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{"long UTF8 escapes", `\U0001014D \u2318 Wh\u00e9\u00e9!`, `𐅍 ⌘ Whéé!`, OK},
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{"UTF8 characters", "Ѝюج wut Ж ?", "Ѝюج wut Ж ?", OK},
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{"example from spec",
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`I'm a string. \"You can quote me\". Name\tJos\u00E9\nLocation\tSF.`,
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"I'm a string. \"You can quote me\". Name\tJosé\nLocation\tSF.", OK},
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} {
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s, err := b.reset().writeString(c.in).asInterpretedString()
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if c.isSuccessCase && err != nil {
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t.Fatalf("[%s] unexpected error for input %q: %s", c.name, c.in, err)
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}
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if !c.isSuccessCase && err == nil {
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t.Fatalf("[%s] expected a failure, but no failure occurred", c.name)
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}
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if s != c.out && c.isSuccessCase {
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t.Fatalf("[%s] %q -> %q failed: actual result = %q", c.name, c.in, c.out, s)
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}
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}
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}
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type stringbufT struct {
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name string
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in string
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out string
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isSuccessCase bool
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}
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const (
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OK bool = true
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FAIL bool = false
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)
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