Hotfix/incorrect array merging

CHANGELOG.md

@@ -1,5 +1,12 @@
 ## [Unreleased]
+### Fixed
+* Array handling in mergeVariables function
+
+## [0.0.6] - 2021-01-11
+### Changed
+* Updated AST version
 
+## [0.0.5] - 2020-12-22
 ### Changed
 * Enhanced logging of HTTP Errors
 

src/internal/interpreter/variables.test.ts

@@ -0,0 +1,108 @@
+import {
+  assertIsVariables,
+  isNonPrimitive,
+  isPrimitive,
+  mergeVariables,
+} from './variables';
+
+describe('Variables', () => {
+  test('assertIsVariables works correctly', () => {
+    expect(() => assertIsVariables('string')).not.toThrow();
+    expect(() => assertIsVariables(123)).not.toThrow();
+    expect(() => assertIsVariables({ x: 1 })).not.toThrow();
+    expect(() => assertIsVariables(true)).not.toThrow();
+    expect(() => assertIsVariables(undefined)).not.toThrow();
+    expect(() => assertIsVariables(['heeelo'])).not.toThrow();
+    expect(() => assertIsVariables(() => 'boom!')).toThrow();
+  });
+
+  test('isPrimitive works correctly', () => {
+    expect(isPrimitive('string')).toBe(true);
+    expect(isPrimitive(123)).toBe(true);
+    expect(isPrimitive(false)).toBe(true);
+    expect(isPrimitive(['heeeelo'])).toBe(true);
+    expect(isPrimitive({ x: 1 })).toBe(false);
+  });
+
+  test('isNonPrimitive works correctly', () => {
+    expect(isNonPrimitive('string')).toBe(false);
+    expect(isNonPrimitive(123)).toBe(false);
+    expect(isNonPrimitive(false)).toBe(false);
+    expect(isNonPrimitive(['heeeelo'])).toBe(false);
+    expect(isNonPrimitive({ x: 1 })).toBe(true);
+  });
+
+  describe('mergeVariables', () => {
+    it('should correctly merge two simple objects', () => {
+      {
+        const left = {};
+        const right = { x: 1 };
+        const result = mergeVariables(left, right);
+
+        expect(result).toEqual({ x: 1 });
+      }
+      {
+        const left = { y: 2 };
+        const right = {};
+        const result = mergeVariables(left, right);
+
+        expect(result).toEqual({ y: 2 });
+      }
+      {
+        const left = { y: 2 };
+        const right = { x: 1 };
+        const result = mergeVariables(left, right);
+
+        expect(result).toEqual({ x: 1, y: 2 });
+      }
+    });
+
+    it('should correctly merge complex objects', () => {
+      {
+        const left = {};
+        const right = { ne: { st: 'ed' } };
+        const result = mergeVariables(left, right);
+
+        expect(result).toEqual({ ne: { st: 'ed' } });
+      }
+      {
+        const left = { not: 'nested' };
+        const right = { ne: { st: 'ed' } };
+        const result = mergeVariables(left, right);
+
+        expect(result).toEqual({ ne: { st: 'ed' }, not: 'nested' });
+      }
+      {
+        const left = { ne: { est: 'eed' } };
+        const right = { ne: { st: 'ed' } };
+        const result = mergeVariables(left, right);
+
+        expect(result).toEqual({ ne: { st: 'ed', est: 'eed' } });
+      }
+    });
+
+    it('should overwrite from left to right', () => {
+      {
+        const left = { overwritten: false };
+        const right = { overwritten: true };
+        const result = mergeVariables(left, right);
+
+        expect(result).toEqual({ overwritten: true });
+      }
+      {
+        const left = { overwritten: { yes: false, no: false } };
+        const right = { overwritten: { yes: true } };
+        const result = mergeVariables(left, right);
+
+        expect(result).toEqual({ overwritten: { yes: true, no: false } });
+      }
+      {
+        const left = { overwritten: 7 };
+        const right = { overwritten: ['seven'] };
+        const result = mergeVariables(left, right);
+
+        expect(result).toEqual({ overwritten: ['seven'] });
+      }
+    });
+  });
+});

src/internal/interpreter/variables.ts

@@ -1,4 +1,5 @@
-export type Primitive = string | boolean | number;
+// Arrays should be considered opaque value and therefore act as a primitive
+export type Primitive = string | boolean | number | unknown[];
 export type NonPrimitive = {
   [key: string]: Primitive | NonPrimitive | undefined;
 };
@@ -23,11 +24,14 @@ export function castToVariables(input: unknown): Variables | undefined {
 }
 
 export function isPrimitive(input: Variables): input is Primitive {
-  return ['string', 'number', 'boolean'].includes(typeof input);
+  return (
+    ['string', 'number', 'boolean'].includes(typeof input) ||
+    Array.isArray(input)
+  );
 }
 
 export function isNonPrimitive(input: Variables): input is NonPrimitive {
-  return typeof input === 'object';
+  return typeof input === 'object' && !Array.isArray(input);
 }
 
 export const mergeVariables = (