added coolprop

src/coolprop-node/test/R449a.test.js

@@ -0,0 +1,94 @@
+const coolprop = require('../src/index.js');
+
+describe('R449a Real Values', () => {
+    it('should calculate superheat correctly at -40°C saturation', async () => {
+        const result = await coolprop.calculateSuperheat({
+            temperature: -35,  // 5K above saturation temp of -40°C
+            pressure: 0,    // saturation pressure at -40°C (from chart)
+            refrigerant: 'R449a',
+            tempUnit: 'C',
+            pressureUnit: 'psig'
+        });
+        expect(result.type).toBe('success');
+        expect(Math.abs(result.superheat - 5)).toBeLessThan(0.2); // Should be ~5K superheat
+    });
+
+    it('should calculate superheat correctly at -20°C saturation', async () => {
+        const result = await coolprop.calculateSuperheat({
+            temperature: -15,  // 5K above saturation temp of -20°C
+            pressure: 20.96,    // saturation pressure at -20°C (from chart)
+            refrigerant: 'R449a',
+            tempUnit: 'C',
+            pressureUnit: 'psig'
+        });
+        //console.log(result);
+        expect(result.type).toBe('success');
+        expect(Math.abs(result.superheat - 5)).toBeLessThan(0.2); // Should be ~5K superheat
+    });
+
+    it('should calculate subcooling correctly at 30°C saturation', async () => {
+        const result = await coolprop.calculateSubcooling({
+            temperature: 25,    // 5K below saturation temp of 30°C
+            pressure: 195,    // saturation pressure at 30°C (from chart)
+            refrigerant: 'R449a',
+            tempUnit: 'C',
+            pressureUnit: 'psig'
+        });
+
+        expect(result.type).toBe('success');
+        expect(Math.abs(result.subcooling - 5)).toBeLessThan(0.2); // Should be ~5K subcooling
+    });
+
+    it('should calculate subcooling correctly at 40°C saturation', async () => {
+        const result = await coolprop.calculateSubcooling({
+            temperature: 35,    // 5K below saturation temp of 40°C
+            pressure: 254.2,    // saturation pressure at 40°C (from chart)
+            refrigerant: 'R449a',
+            tempUnit: 'C',
+            pressureUnit: 'psig'
+        });
+        
+        expect(result.type).toBe('success');
+        expect(Math.abs(result.subcooling - 5)).toBeLessThan(0.2); // Should be ~5K subcooling
+    });
+
+    it('should calculate zero superheat at saturation point', async () => {
+        const result = await coolprop.calculateSuperheat({
+            temperature: 0,     // Exact saturation temperature
+            pressure: 74.05,    // Matching saturation pressure from chart
+            refrigerant: 'R449a',
+            tempUnit: 'C',
+            pressureUnit: 'psig'
+        });
+        
+        expect(result.type).toBe('success');
+        expect(Math.abs(result.superheat)).toBeLessThan(0.2); // Should be ~0K superheat
+    });
+
+    it('should calculate zero subcooling at saturation point', async () => {
+        const result = await coolprop.calculateSubcooling({
+            temperature: 20,    // Exact saturation temperature
+            pressure: 146.0,    // Matching saturation pressure from chart
+            refrigerant: 'R449a',
+            tempUnit: 'C',
+            pressureUnit: 'psig'
+        });
+        
+        expect(result.type).toBe('success');
+        expect(Math.abs(result.subcooling)).toBeLessThan(0.2); // Should be ~0K subcooling
+    });
+
+    
+    it('It should also work with R449A (capital A)', async () => {
+        const result = await coolprop.calculateSubcooling({
+            temperature: 20,    // Exact saturation temperature
+            pressure: 146.0,    // Matching saturation pressure from chart
+            refrigerant: 'R449A',
+            tempUnit: 'C',
+            pressureUnit: 'psig'
+        });
+        
+        expect(result.type).toBe('success');
+        expect(Math.abs(result.subcooling)).toBeLessThan(0.2); // Should be ~0K subcooling
+    });
+});