Add tests for dotnet install

Author: andyleejordan

test/core/platform.test.ts

@@ -387,6 +387,26 @@ if (process.platform === "win32") {
                 },
             },
         },
+        {
+            name: "Windows (dotnet)",
+            platformDetails: {
+                operatingSystem: platform.OperatingSystem.Windows,
+                isOS64Bit: true,
+                isProcess64Bit: true,
+            },
+            environmentVars: {
+                "USERNAME": "test",
+                "USERPROFILE": "C:\\Users\\test",
+            },
+            expectedPowerShellSequence: [
+                { exePath: "C:\\Users\\test\\tools\\pwsh.exe", displayName: ".NET Core PowerShell Global Tool", supportsProperArguments: false },
+            ],
+            filesystem: {
+                "C:\\Users\\test\\tools": {
+                    "pwsh.exe": "",
+                },
+            },
+        },
     ];
 } else {
     successTestCases = [
@@ -480,6 +500,46 @@ if (process.platform === "win32") {
                 },
             },
         },
+        {
+            name: "MacOS (dotnet)",
+            platformDetails: {
+                operatingSystem: platform.OperatingSystem.MacOS,
+                isOS64Bit: true,
+                isProcess64Bit: true,
+            },
+            environmentVars: {
+                "USER": "test",
+                "HOME": "/Users/test",
+            },
+            expectedPowerShellSequence: [
+                { exePath: "/Users/test/.dotnet/tools/pwsh", displayName: ".NET Core PowerShell Global Tool", supportsProperArguments: false },
+            ],
+            filesystem: {
+                "/Users/test/.dotnet/tools": {
+                    pwsh: "",
+                },
+            },
+        },
+        {
+            name: "Linux (dotnet)",
+            platformDetails: {
+                operatingSystem: platform.OperatingSystem.Linux,
+                isOS64Bit: true,
+                isProcess64Bit: true,
+            },
+            environmentVars: {
+                "USER": "test",
+                "HOME": "/home/test",
+            },
+            expectedPowerShellSequence: [
+                { exePath: "/home/test/.dotnet/tools/pwsh", displayName: ".NET Core PowerShell Global Tool", supportsProperArguments: false },
+            ],
+            filesystem: {
+                "/home/test/.dotnet/tools": {
+                    pwsh: "",
+                },
+            },
+        },
     ];
 }
 
@@ -585,6 +645,7 @@ describe("Platform module", function () {
 
                 assert.strictEqual(defaultPowerShell.exePath, expectedPowerShell.exePath);
                 assert.strictEqual(defaultPowerShell.displayName, expectedPowerShell.displayName);
+                assert.strictEqual(defaultPowerShell.supportsProperArguments, expectedPowerShell.supportsProperArguments);
             });
         }
 
@@ -620,6 +681,7 @@ describe("Platform module", function () {
 
                     assert.strictEqual(foundPowerShell && foundPowerShell.exePath, expectedPowerShell.exePath);
                     assert.strictEqual(foundPowerShell && foundPowerShell.displayName, expectedPowerShell.displayName);
+                    assert.strictEqual(foundPowerShell && foundPowerShell.supportsProperArguments, expectedPowerShell.supportsProperArguments);
                 }
 
                 assert.strictEqual(