Increased Visualization UI Testing Coverage (#48)

# *Increased Visualization UI Testing Coverage*

## ♻️ Current situation & Problem
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ensure that all non-trivial PRs are first tracked and discussed in an
existing GitHub issue or discussion.*


## ⚙️ Release Notes 
*Add a bullet point list summary of the feature and possible migration
guides if this is a breaking change so this section can be added to the
release notes.*
*Include code snippets that provide examples of the feature implemented
or links to the documentation if it appends or changes the public
interface.*
This PR expands the testing coverage for the health data visualizations.
- We include UI testing for threshold and average elements for each type
of chart
- We include UI testing for correct summary text when a data point is
clicked


## 📚 Documentation
*Please ensure that you properly document any additions in conformance
to [Spezi Documentation
Guide](https://github.com/StanfordSpezi/.github/blob/main/DOCUMENTATIONGUIDE.md).*
*You can use this section to describe your solution, but we encourage
contributors to document your reasoning and changes using in-line
documentation.*


## ✅ Testing
*Please ensure that the PR meets the testing requirements set by CodeCov
and that new functionality is appropriately tested.*
*This section describes important information about the tests and why
some elements might not be testable.*


## 📝 Code of Conduct & Contributing Guidelines 

By submitting creating this pull request, you agree to follow our [Code
of
Conduct](https://github.com/CS342/.github/blob/main/CODE_OF_CONDUCT.md)
and [Contributing
Guidelines](https://github.com/CS342/.github/blob/main/CONTRIBUTING.md):
- [x] I agree to follow the [Code of
Conduct](https://github.com/CS342/.github/blob/main/CODE_OF_CONDUCT.md)
and [Contributing
Guidelines](https://github.com/CS342/.github/blob/main/CONTRIBUTING.md).

---------

Co-authored-by: Sixian Du <[email protected]>

Author: Priyankas007

NeutroFeverGuardUITests/HKVisualizationTests.swift

@@ -45,11 +45,6 @@ class HKVisualizationTests: XCTestCase {
         XCTAssertTrue(app.staticTexts["Body Temperature Over Time"].exists)
         XCTAssertTrue(app.staticTexts["Heart Rate Over Time"].exists)
 
-        // Test Lollipop functions
-        XCTAssertTrue(app.tabBars["Tab Bar"].buttons["Dashboard"].waitForExistence(timeout: 2))
-        app.tabBars["Tab Bar"].buttons["Dashboard"].tap()
-        try app.handleHealthKitAuthorization()
-        
         // Wait for chart to appear
         let chartTitle = app.staticTexts["Oxygen Saturation Over Time"]
         XCTAssertTrue(chartTitle.waitForExistence(timeout: 5))
@@ -69,4 +64,36 @@ class HKVisualizationTests: XCTestCase {
         let dateExists = app.staticTexts[dateStr].waitForExistence(timeout: 2)
         XCTAssertTrue(dateExists, "Today's date (\(dateStr)) should appear after tapping")
     }
+    
+    @MainActor
+    func testThresholdAndAverageForAllCharts() throws {
+        let app = XCUIApplication()
+        
+        XCTAssertTrue(app.wait(for: .runningForeground, timeout: 2.0))
+        
+        XCTAssertTrue(app.tabBars["Tab Bar"].buttons["Dashboard"].waitForExistence(timeout: 2))
+        app.tabBars["Tab Bar"].buttons["Dashboard"].tap()
+        try app.handleHealthKitAuthorization()
+        
+        // Check for Heart Rate Chart
+        let heartRateChartTitle = app.staticTexts["Heart Rate Over Time"]
+        XCTAssertTrue(heartRateChartTitle.waitForExistence(timeout: 5), "Heart Rate chart title should exist")
+        
+        let heartRateThreshold = app.otherElements["Threshold"]
+        XCTAssertTrue(heartRateThreshold.waitForExistence(timeout: 2), "Heart Rate threshold line should be visible.")
+        
+        // Check for Body Temperature Chart
+        let bodyTempChartTitle = app.staticTexts["Body Temperature Over Time"]
+        XCTAssertTrue(bodyTempChartTitle.waitForExistence(timeout: 5), "Body Temperature chart title should exist")
+        
+        let bodyTempThreshold = app.otherElements["Threshold"]
+        XCTAssertTrue(bodyTempThreshold.waitForExistence(timeout: 2), "Body Temperature threshold line should be visible.")
+        
+        // Check for Oxygen Saturation Chart
+        let oxygenSatChartTitle = app.staticTexts["Oxygen Saturation Over Time"]
+        XCTAssertTrue(oxygenSatChartTitle.waitForExistence(timeout: 5), "Oxygen Saturation chart title should exist")
+        
+        let oxygenSatThreshold = app.otherElements["Threshold"]
+        XCTAssertTrue(oxygenSatThreshold.waitForExistence(timeout: 2), "Oxygen Saturation threshold line should be visible.")
+    }
 }