package typeset

import "testing"
import "golang.org/x/image/math/fixed"
import "golang.org/x/image/font/basicfont"

const basicfontFace7x13advance = 7

func tkw (kind tokenKind, value string, width fixed.Int26_6) token {
	tok := tk(kind, value)
	tok.width = width
	for index, runl := range tok.runes {
		runl.x = fixed.I(basicfontFace7x13advance * index)
		tok.runes[index] = runl
	}
	return tok
}

func TestMeasure (test *testing.T) {
	// ---- processing ----
	tokens := []token {
		tk(tokenKindWord, "hello"),
		tk(tokenKindSpace, " "),
		tk(tokenKindWord, "\rworld!"),
		tk(tokenKindLineBreak, "\n"),
		tk(tokenKindWord, "foo"),
		tk(tokenKindLineBreak, "\n"),
		tk(tokenKindLineBreak, "\r\n"),
		tk(tokenKindWord, "bar"),
		tk(tokenKindTab, "\t"),
		tk(tokenKindWord, "baz"),
		tk(tokenKindTab, "\t\t"),
		tk(tokenKindWord, "something"),
	}
	measure(tokens, basicfont.Face7x13)
	
	// ---- correct data ----
	correctTokens := []token {
		tkw(tokenKindWord,      "hello",     fixed.I(35)),
		tkw(tokenKindSpace,     " ",         fixed.I( 7)),
		tkw(tokenKindWord,      "\rworld!",  fixed.I(49)),
		tkw(tokenKindLineBreak, "\n",        fixed.I( 7)),
		tkw(tokenKindWord,      "foo",       fixed.I(21)),
		tkw(tokenKindLineBreak, "\n",        fixed.I( 7)),
		tkw(tokenKindLineBreak, "\r\n",      fixed.I(14)),
		tkw(tokenKindWord,      "bar",       fixed.I(21)),
		tkw(tokenKindTab,       "\t",        fixed.I( 7)),
		tkw(tokenKindWord,      "baz",       fixed.I(21)),
		tkw(tokenKindTab,       "\t\t",      fixed.I(14)),
		tkw(tokenKindWord,      "something", fixed.I(63)),
	}

	// ---- testing ----
	if len(tokens) != len(correctTokens) {
		test.Logf("len(tokens) != len(correctTokens): %d, %d", len(tokens), len(correctTokens))
		test.Log("GOT")
		logTokens(test, tokens)
		test.Log("CORRECT")
		logTokens(test, correctTokens)
		test.FailNow()
	}
	if !compareTokens(tokens, correctTokens) {
		test.Log("tokens != correctTokens:")
		test.Log("GOT")
		logTokens(test, tokens)
		test.Log("CORRECT")
		logTokens(test, correctTokens)
		test.FailNow()
	}
}