summaryrefslogtreecommitdiffstats
path: root/modules/templates/eval/eval_test.go
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--modules/templates/eval/eval_test.go94
1 files changed, 94 insertions, 0 deletions
diff --git a/modules/templates/eval/eval_test.go b/modules/templates/eval/eval_test.go
new file mode 100644
index 0000000..3e68203
--- /dev/null
+++ b/modules/templates/eval/eval_test.go
@@ -0,0 +1,94 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package eval
+
+import (
+ "math"
+ "strings"
+ "testing"
+
+ "github.com/stretchr/testify/assert"
+ "github.com/stretchr/testify/require"
+)
+
+func tokens(s string) (a []any) {
+ for _, v := range strings.Fields(s) {
+ a = append(a, v)
+ }
+ return a
+}
+
+func TestEval(t *testing.T) {
+ n, err := Expr(0, "/", 0.0)
+ require.NoError(t, err)
+ assert.True(t, math.IsNaN(n.Value.(float64)))
+
+ _, err = Expr(nil)
+ require.ErrorContains(t, err, "unsupported token type")
+ _, err = Expr([]string{})
+ require.ErrorContains(t, err, "unsupported token type")
+ _, err = Expr(struct{}{})
+ require.ErrorContains(t, err, "unsupported token type")
+
+ cases := []struct {
+ expr string
+ want any
+ }{
+ {"-1", int64(-1)},
+ {"1 + 2", int64(3)},
+ {"3 - 2 + 4", int64(5)},
+ {"1 + 2 * 3", int64(7)},
+ {"1 + ( 2 * 3 )", int64(7)},
+ {"( 1 + 2 ) * 3", int64(9)},
+ {"( 1 + 2.0 ) / 3", float64(1)},
+ {"sum( 1 , 2 , 3 , 4 )", int64(10)},
+ {"100 + sum( 1 , 2 + 3 , 0.0 ) / 2", float64(103)},
+ {"100 * 5 / ( 5 + 15 )", int64(25)},
+ {"9 == 5", int64(0)},
+ {"5 == 5", int64(1)},
+ {"9 != 5", int64(1)},
+ {"5 != 5", int64(0)},
+ {"9 > 5", int64(1)},
+ {"5 > 9", int64(0)},
+ {"5 >= 9", int64(0)},
+ {"9 >= 9", int64(1)},
+ {"9 < 5", int64(0)},
+ {"5 < 9", int64(1)},
+ {"9 <= 5", int64(0)},
+ {"5 <= 5", int64(1)},
+ {"1 and 2", int64(1)}, // Golang template definition: non-zero values are all truth
+ {"1 and 0", int64(0)},
+ {"0 and 0", int64(0)},
+ {"1 or 2", int64(1)},
+ {"1 or 0", int64(1)},
+ {"0 or 1", int64(1)},
+ {"0 or 0", int64(0)},
+ {"not 2 == 1", int64(1)},
+ {"not not ( 9 < 5 )", int64(0)},
+ }
+
+ for _, c := range cases {
+ n, err := Expr(tokens(c.expr)...)
+ require.NoError(t, err, "expr: %s", c.expr)
+ assert.Equal(t, c.want, n.Value)
+ }
+
+ bads := []struct {
+ expr string
+ errMsg string
+ }{
+ {"0 / 0", "integer divide by zero"},
+ {"1 +", "num stack is empty"},
+ {"+ 1", "num stack is empty"},
+ {"( 1", "incomplete sub-expression"},
+ {"1 )", "op stack is empty"}, // can not find the corresponding open bracket after the stack becomes empty
+ {"1 , 2", "expect 1 value as final result"},
+ {"( 1 , 2 )", "too many values in one bracket"},
+ {"1 a 2", "unknown operator"},
+ }
+ for _, c := range bads {
+ _, err = Expr(tokens(c.expr)...)
+ require.ErrorContains(t, err, c.errMsg, "expr: %s", c.expr)
+ }
+}