chore: migrate test cases from Chai to Jest

src/render/boolean.spec.ts

@@ -0,0 +1,94 @@
+import { isTruthy, isFalsy } from './boolean'
+import { Context } from '../context'
+
+describe('boolean Shopify', function () {
+  describe('.isTruthy()', function () {
+    const ctx = {
+      opts: {
+        jsTruthy: false
+      }
+    } as unknown as Context
+    //
+    // Spec: https://shopify.github.io/liquid/basics/truthy-and-falsy/
+    it('true is truthy', function () {
+      expect(isTruthy(true, ctx)).toBeTruthy()
+    })
+    it('false is falsy', function () {
+      expect(isTruthy(false, ctx)).toBeFalsy()
+    })
+    it('null is falsy', function () {
+      expect(isTruthy(null, ctx)).toBeFalsy()
+    })
+    it('"foo" is truthy', function () {
+      expect(isTruthy('foo', ctx)).toBeTruthy()
+    })
+    it('"" is truthy', function () {
+      expect(isTruthy('', ctx)).toBeTruthy()
+    })
+    it('0 is truthy', function () {
+      expect(isTruthy(0, ctx)).toBeTruthy()
+    })
+    it('1 is truthy', function () {
+      expect(isTruthy(1, ctx)).toBeTruthy()
+    })
+    it('1.1 is truthy', function () {
+      expect(isTruthy(1.1, ctx)).toBeTruthy()
+    })
+    it('[1] is truthy', function () {
+      expect(isTruthy([1], ctx)).toBeTruthy()
+    })
+    it('[] is truthy', function () {
+      expect(isTruthy([], ctx)).toBeTruthy()
+    })
+  })
+})
+
+describe('boolean jsTruthy', function () {
+  const ctx = {
+    opts: {
+      jsTruthy: true
+    }
+  } as unknown as Context
+
+  describe('.isFalsy()', function () {
+    it('null is always falsy', function () {
+      expect(isFalsy(null, ctx)).toBeTruthy()
+    })
+  })
+
+  describe('.isTruthy()', function () {
+    it('true is truthy', function () {
+      expect(isTruthy(true, ctx)).toBeTruthy()
+    })
+    it('false is falsy', function () {
+      expect(isTruthy(false, ctx)).toBeFalsy()
+    })
+    it('null is always falsy', function () {
+      expect(isTruthy(null, ctx)).toBeFalsy()
+    })
+    it('null is always falsy', function () {
+      expect(isTruthy(null, ctx)).toBeFalsy()
+    })
+    it('"foo" is truthy', function () {
+      expect(isTruthy('foo', ctx)).toBeTruthy()
+    })
+    it('"" is falsy', function () {
+      expect(isTruthy('', ctx)).toBeFalsy()
+    })
+    it('0 is falsy', function () {
+      expect(isTruthy(0, ctx)).toBeFalsy()
+    })
+    it('1 is truthy', function () {
+      expect(isTruthy(1, ctx)).toBeTruthy()
+    })
+    it('1.1 is truthy', function () {
+      expect(isTruthy(1.1, ctx)).toBeTruthy()
+    })
+    it('[1] is truthy', function () {
+      expect(isTruthy([1], ctx)).toBeTruthy()
+    })
+    it('[] is truthy', function () {
+      expect(isTruthy([], ctx)).toBeTruthy()
+    })
+  })
+})