test: colorTextBySeverity tests

test/jest/unit/common.spec.ts

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+import { colorTextBySeverity } from '../../../src/lib/snyk-test/common';
+import { color } from '../../../src/lib/theme';
+import { SEVERITY } from '../../../src/lib/snyk-test/common';
+
+describe('colorTextBySeverity', () => {
+  it('Returns a high severity colored text', () => {
+    const severity = SEVERITY.HIGH;
+    expect(colorTextBySeverity(severity, 'Pls help me')).toEqual(
+      color.severity[severity]('Pls help me'),
+    );
+  });
+
+  it('Pass an empty string as text', () => {
+    const severity = SEVERITY.HIGH;
+    expect(colorTextBySeverity(severity, '')).toEqual(
+      color.severity[severity](''),
+    );
+  });
+
+  it('Pass an empty string as severity', () => {
+    const severity = '';
+    const defaultSeverity = SEVERITY.LOW;
+    expect(colorTextBySeverity(severity, 'Pls help me')).toEqual(
+      color.severity[defaultSeverity]('Pls help me'),
+    );
+  });
+
+  it('Set defaultive low color when given a non existent severity', () => {
+    const severity = 'nonExistentSeverity';
+    const defaultSeverity = SEVERITY.LOW;
+    expect(colorTextBySeverity(severity, 'Pls help me')).toEqual(
+      color.severity[defaultSeverity]('Pls help me'),
+    );
+  });
+
+  it('Pass an upper case string as severity', () => {
+    const severity = 'HIGH';
+    const lowerCaseSeverity = SEVERITY.HIGH;
+    expect(colorTextBySeverity(severity, 'Pls help me')).toEqual(
+      color.severity[lowerCaseSeverity]('Pls help me'),
+    );
+  });
+});