test(node): Fix config wizard storage path tests (#2906)

Fixed config wizard storage path assertions to be compatible with Mac
OS. In the assertion we compare the real path to a symbolic link in Mac
OS and thererore the test fails.

## Change

Now compares normalized paths, i.e. uses `realpathSync` which resolves
symbolic links.

## Error

```
    expect(received).toInclude(expected)

    Expected string to include:
      "streamr-node /var/folders/_1/sztmfs_j15zg4t29k2nql0040000gn/T/test-config-wizardhSM4Wz/config.json
    "
    Received:
      "Welcome to the Streamr Network!
        This Config Wizard will help you setup your node.·····
        The steps are documented here:
        https://docs.streamr.network/guides/how-to-run-streamr-node#config-wizard
    ✓ Congratulations, you've setup your Streamr node!
        Your node address is 0x909DC59FF7A3b23126bc6F86ad44dD808fd424Dc
        Your node's generated name is Mountain Until Gun
    You can start your Streamr node now with
        streamr-node /var/folders/1/sztmfsj15zg4t29k2nql0040000gn/T/test-config-wizardhSM4Wz/config.json·····
        For environment specific run instructions, see
        https://docs.streamr.network/guides/how-to-run-streamr-node"

      158 |         expect(summary).toInclude(`generated name is Mountain Until Gun\n`)
      159 |
    > 160 |         expect(summary).toInclude(`streamr-node ${storagePath}\n`)
          |                         ^
      161 |     })
      162 |
      163 |     it('prints out the generated private key onto the screen if told to', async () => {

      at Object.<anonymous> (test/unit/ConfigWizard.test.ts:160:25)
```

packages/node/test/unit/ConfigWizard.test.ts

@@ -1,4 +1,4 @@
-import { existsSync, mkdtempSync, readFileSync, writeFileSync } from 'fs'
+import { existsSync, mkdtempSync, readFileSync, realpathSync, writeFileSync } from 'fs'
 import os from 'os'
 import path from 'path'
 import { getNodeMnemonic, start } from '../../src/config/ConfigWizard'
@@ -78,10 +78,25 @@ const IMPORTED_PRIVATE_KEY =
 
 const OPERATOR_ADDRESS = '0x54d68882d5329397928787ec496da3ba8e45c48c'
 
+const extractStoragePath = (summary: string): string | undefined => {
+    const match = summary.match(/streamr-node ([^\s]w+)/)
+    return (match !== null) ? match[1] : undefined
+}
+
+const expectPathsEqual = (actual: string | undefined, expected: string): void => {
+    if (actual !== undefined) {
+        const normalizedActual = path.normalize(realpathSync(actual))
+        const normaliszedExpected = path.normalize(realpathSync(expected))
+        expect(normalizedActual).toEqual(normaliszedExpected)
+    } else {
+        expect.fail('Path is undefined')
+    }
+}
+
 describe('Config wizard', () => {
-    let tempDir = mkdtempSync(path.join(os.tmpdir(), 'test-config-wizard'))
+    let tempDir: string
 
-    let storagePath = path.join(tempDir, 'config.json')
+    let storagePath: string
 
     const fakeBalance = jest.fn(() => '0.0')
 
@@ -157,7 +172,7 @@ describe('Config wizard', () => {
 
         expect(summary).toInclude(`generated name is Mountain Until Gun\n`)
 
-        expect(summary).toInclude(`streamr-node ${storagePath}\n`)
+        expectPathsEqual(extractStoragePath(summary), storagePath)
     })
 
     it('prints out the generated private key onto the screen if told to', async () => {
@@ -220,7 +235,7 @@ describe('Config wizard', () => {
 
         expect(summary).toInclude(`generated name is Flee Kit Stomach\n`)
 
-        expect(summary).toInclude(`streamr-node ${storagePath}\n`)
+        expectPathsEqual(extractStoragePath(summary), storagePath)
     })
 
     it('validates given private key', async () => {
@@ -299,7 +314,7 @@ describe('Config wizard', () => {
 
         expect(summary).toInclude(`generated name is Mountain Until Gun\n`)
 
-        expect(summary).toInclude(`streamr-node ${storagePath}\n`)
+        expectPathsEqual(extractStoragePath(summary), storagePath)
     })
 
     it('validates the operator address', async () => {
@@ -387,7 +402,7 @@ describe('Config wizard', () => {
 
         expect(summary).toInclude(`generated name is Mountain Until Gun\n`)
 
-        expect(summary).toInclude(`streamr-node ${storagePath}\n`)
+        expectPathsEqual(extractStoragePath(summary), storagePath)
     })
 
     it('enables websocket plugin on a custom port', async () => {
@@ -445,7 +460,7 @@ describe('Config wizard', () => {
 
         expect(summary).toInclude(`generated name is Mountain Until Gun\n`)
 
-        expect(summary).toInclude(`streamr-node ${storagePath}\n`)
+        expectPathsEqual(extractStoragePath(summary), storagePath)
     })
 
     it('enables mqtt plugin on the default port', async () => {
@@ -507,7 +522,7 @@ describe('Config wizard', () => {
 
         expect(summary).toInclude(`generated name is Mountain Until Gun\n`)
 
-        expect(summary).toInclude(`streamr-node ${storagePath}\n`)
+        expectPathsEqual(extractStoragePath(summary), storagePath)
     })
 
     it('enables mqtt plugin on a custom port', async () => {
@@ -569,7 +584,7 @@ describe('Config wizard', () => {
 
         expect(summary).toInclude(`generated name is Mountain Until Gun\n`)
 
-        expect(summary).toInclude(`streamr-node ${storagePath}\n`)
+        expectPathsEqual(extractStoragePath(summary), storagePath)
     })
 
     it('enables http plugin on the default port', async () => {
@@ -632,7 +647,7 @@ describe('Config wizard', () => {
 
         expect(summary).toInclude(`generated name is Mountain Until Gun\n`)
 
-        expect(summary).toInclude(`streamr-node ${storagePath}\n`)
+        expectPathsEqual(extractStoragePath(summary), storagePath)
     })
 
     it('enables http plugin on a custom port', async () => {
@@ -693,7 +708,7 @@ describe('Config wizard', () => {
 
         expect(summary).toInclude(`generated name is Mountain Until Gun\n`)
 
-        expect(summary).toInclude(`streamr-node ${storagePath}\n`)
+        expectPathsEqual(extractStoragePath(summary), storagePath)
     })
 
     it('enables all pubsub plugins on default ports', async () => {
@@ -766,7 +781,7 @@ describe('Config wizard', () => {
 
         expect(summary).toInclude(`generated name is Mountain Until Gun\n`)
 
-        expect(summary).toInclude(`streamr-node ${storagePath}\n`)
+        expectPathsEqual(extractStoragePath(summary), storagePath)
     })
 
     it('enables all pubsub plugins on custom ports', async () => {
@@ -837,7 +852,7 @@ describe('Config wizard', () => {
 
         expect(summary).toInclude(`generated name is Mountain Until Gun\n`)
 
-        expect(summary).toInclude(`streamr-node ${storagePath}\n`)
+        expectPathsEqual(extractStoragePath(summary), storagePath)
     })
 
     it('validates port number values', async () => {
@@ -947,7 +962,7 @@ describe('Config wizard', () => {
 
         expect(summary).toInclude(`generated name is Mountain Until Gun\n`)
 
-        expect(summary).toInclude(`streamr-node ${storagePath}\n`)
+        expectPathsEqual(extractStoragePath(summary), storagePath)
     })
 
     it('disallows taking default ports if they are inexplicitly used', async () => {
@@ -1024,7 +1039,7 @@ describe('Config wizard', () => {
 
         expect(summary).toInclude(`generated name is Mountain Until Gun\n`)
 
-        expect(summary).toInclude(`streamr-node ${storagePath}\n`)
+        expectPathsEqual(extractStoragePath(summary), storagePath)
     })
 
     it('allows to uses a custom file path for the config file', async () => {
@@ -1234,7 +1249,7 @@ describe('Config wizard', () => {
 
         expect(summary).toInclude(`generated name is Mountain Until Gun\n`)
 
-        expect(summary).toInclude(`streamr-node ${storagePath}\n`)
+        expectPathsEqual(extractStoragePath(summary), storagePath)
     })
 
     it('tells the user to fund their node address if the balance is too low', async () => {