fix: contains regression (#677)

* fix: `contains` regression on string-like objects, #675

* chore: fix build docs on macos

bin/build-changelog.sh

@@ -1,17 +1,8 @@
 #!/usr/bin/env bash
 
-# Run `sed` in a way that's compatible with both macOS (BSD) and Linux (GNU)
-sedi() {
-  if [[ "$OSTYPE" == "darwin"* ]]; then
-    sed -i '' "$@"
-  else
-    sed -i "$@"
-  fi
-}
-
 cd docs
 cp ../CHANGELOG.md source/tutorials/changelog.md
-sedi \
+sed -i \
   -e 's/{%/{% raw %}{%{% endraw %}/g' \
   -e 's/{{/{% raw %}{{{% endraw %}/g' \
   -e '1 s/"/\"/g' \
@@ -20,7 +11,7 @@ sedi \
   source/tutorials/changelog.md
 cp source/tutorials/changelog.md source/zh-cn/tutorials/changelog.md
 
-sedi -e '1i\
+sed -i -e '1i\
  ---\ntitle: Changelog\nauto: true\n---\n' source/tutorials/changelog.md
-sedi -e '1i\
+sed -i -e '1i\
  ---\ntitle: 更新日志\nauto: true\n---\n' source/zh-cn/tutorials/changelog.md

src/render/operator.ts

@@ -2,7 +2,7 @@ import { isComparable } from '../drop/comparable'
 import { Context } from '../context'
 import { toValue } from '../util'
 import { isFalsy, isTruthy } from '../render/boolean'
-import { isArray, isString } from '../util/underscore'
+import { isArray, isFunction } from '../util/underscore'
 
 export type UnaryOperatorHandler = (operand: any, ctx: Context) => boolean;
 export type BinaryOperatorHandler = (lhs: any, rhs: any, ctx: Context) => boolean;
@@ -35,7 +35,7 @@ export const defaultOperators: Operators = {
   'contains': (l: any, r: any) => {
     l = toValue(l)
     if (isArray(l)) return l.some((i) => equal(i, r))
-    if (isString(l)) return l.indexOf(toValue(r)) > -1
+    if (isFunction(l?.indexOf)) return l.indexOf(toValue(r)) > -1
     return false
   },
   'not': (v: any, ctx: Context) => isFalsy(toValue(v), ctx),

test/e2e/issues.spec.ts

@@ -485,4 +485,18 @@ describe('Issues', function () {
     '{% endif %}', {})
     expect(result).toEqual('show')
   })
+  it('#675 10.10.1 Operator: contains regression', () => {
+    const engine = new Liquid()
+    class StrictStringForLiquid {
+      constructor (private value: string) {}
+      indexOf (other: unknown) {
+        return this.value.indexOf(String(other))
+      }
+    }
+    const result = engine.parseAndRenderSync('{{ str contains sub }}', {
+      str: new StrictStringForLiquid('string'),
+      sub: 'str'
+    })
+    expect(result).toEqual('true')
+  })
 })