test: unit tests for slack source

src/v0/sources/slack/util.test.js

@@ -0,0 +1,51 @@
+const { tsToISODate, normalizeEventName } = require('./util.js');
+
+describe('Unit test cases for tsToISODate', () => {
+  it('should return a valid iso date string for a valid slack timestamp input', () => {
+    const result = tsToISODate('1609459200.123000');
+    expect(result).toBe('2021-01-01T00:00:00.123Z');
+  });
+
+  it('should return iso date string of today when slack timestamp argument is not provided', () => {
+    const result = tsToISODate();
+    expect(result).not.toBeNull();
+    expect(typeof result).toBe('string');
+    expect(result).not.toHaveLength(0);
+    // Check if the result is a valid date
+    const dateObject = new Date(result);
+    const resultTime = dateObject.getTime();
+    expect(resultTime).not.toBeNaN();
+    // Check if the result is close to the current time with precision tolerance of upto a minute
+    const nowTime = new Date().getTime();
+    const TOLERANCE = 60000; // In ms
+    const timeDiff = Math.abs(nowTime - resultTime);
+    expect(timeDiff).toBeLessThanOrEqual(TOLERANCE);
+  });
+
+  it('should return null if the slack timestamp argument is invalid', () => {
+    const result = tsToISODate('invalid.slack.timestamp');
+    expect(result).toBeNull();
+  });
+});
+
+describe('Unit test cases for normalizeEventName', () => {
+  it('should normalize a valid snake case string "member_joined_channel" to RudderStack format "Member Joined Channel"', () => {
+    const result = normalizeEventName('member_joined_channel');
+    expect(result).toBe('Member Joined Channel');
+  });
+
+  it('should return undefined string when event name is undefined', () => {
+    const result = normalizeEventName(undefined);
+    expect(result).toBe('undefined');
+  });
+
+  it('should return undefined string when event name is null', () => {
+    const result = normalizeEventName(null);
+    expect(result).toBe('undefined');
+  });
+
+  it('should return undefined string when event name argument cannot be parsed to string', () => {
+    const result = normalizeEventName({});
+    expect(result).toBe('undefined');
+  });
+});