Replace expressions engine (#133)

internal/expr/lexer_test.go

@@ -0,0 +1,56 @@
+package workflow
+
+import (
+	"math"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestLexer(t *testing.T) {
+	input := "github.event_name == 'push' && github.ref == 'refs/heads/main'"
+	lexer := NewLexer(input, 0)
+	var tokens []*Token
+	for {
+		tok := lexer.Next()
+		if tok == nil || tok.Kind == TokenKindUnexpected {
+			break
+		}
+		tokens = append(tokens, tok)
+	}
+	for i, tok := range tokens {
+		t.Logf("Token %d: Kind=%v, Value=%v", i, tok.Kind, tok.Value)
+	}
+	assert.Equal(t, tokens[1].Kind, TokenKindDereference)
+}
+
+func TestLexerNumbers(t *testing.T) {
+	table := []struct {
+		in  string
+		out interface{}
+	}{
+		{"-Infinity", math.Inf(-1)},
+		{"Infinity", math.Inf(1)},
+		{"2.5", float64(2.5)},
+		{"3.3", float64(3.3)},
+		{"1", float64(1)},
+		{"-1", float64(-1)},
+		{"0x34", float64(0x34)},
+		{"0o34", float64(0o34)},
+	}
+	for _, cs := range table {
+		lexer := NewLexer(cs.in, 0)
+		var tokens []*Token
+		for {
+			tok := lexer.Next()
+			if tok == nil || tok.Kind == TokenKindUnexpected {
+				break
+			}
+			tokens = append(tokens, tok)
+		}
+		require.Len(t, tokens, 1)
+		assert.Equal(t, cs.out, tokens[0].Value)
+		assert.Equal(t, cs.in, tokens[0].Raw)
+	}
+}