docs: refresh test/source counts and untested-class list

Several docs had counts that drifted years out of date. Verified against
the working tree on master at this run:

  - Production source classes (src/gvisual + src/app, non-test): 175
    (was 145/158)
  - Analyzer classes (*Analyzer.java): 58 (was 57)
  - Test classes under Gvisual/test/ (Surefire's testSourceDirectory):
    133 = 129 gvisual + 4 app (docs variously said 66/100/106/116)
  - @test methods across those classes: ~4,640 (docs said 2,100 / 2,500)

Files updated: README.md (badge, intro, two summary lines), TESTING.md
(metrics table + directory tree + Classes Without Tests list),
CONTRIBUTING.md (intro line + tree + summary), ARCHITECTURE.md (tree +
summary).

Also refreshed TESTING.md's Classes Without Tests section: the old list
of 40 included 12 classes that have since gained dedicated tests
(AdjacencyListExporter, DimacsExporter, NetworkFlowExporter,
GraphComplementAnalyzer, GraphDegreeSequenceRandomizer,
GraphHealthChecker, GraphMotifFinder, GraphProductCalculator,
AnalysisResult, EdgeType, QuadTree, RandomGraphGenerator). New count is
28, and a note points contributors at the skeleton tests still sitting
in Gvisual/src/test/.

Author: sauravbhattacharya001

ARCHITECTURE.md

@@ -23,8 +23,8 @@ GraphVisual/
 │   │       ├── addLocation.java   # WiFi-based meeting location classification
 │   │       └── matchImei.java     # Device → IMEI mapping
 │   ├── test/
-│   │   ├── gvisual/           # 66 test classes (~2100+ tests total)
-│   │   └── app/               # Pipeline utility tests (2 test classes)
+│   │   ├── gvisual/           # 129 test classes (~4,640+ tests total)
+│   │   └── app/               # Pipeline utility tests (4 test classes)
 │   ├── lib/                   # JUNG 2.0.1, PostgreSQL JDBC, Java3D, Commons IO
 │   └── images/                # UI icons (play, pause, stop, legend colors)
 ├── pom.xml                    # Maven build (Java 11+, shade plugin for fat JAR)
@@ -194,7 +194,7 @@ See [DATABASE.md](DATABASE.md) for full schema documentation.
 
 ## Testing
 
-68 test classes with ~2100+ tests covering all analyzers, utilities, and security:
+133 test classes with ~4,640+ tests covering all analyzers, utilities, and security:
 
 | Test Class | Tests | Covers |
 |------------|-------|--------|

CONTRIBUTING.md

@@ -1,6 +1,6 @@
 # Contributing to GraphVisual
 
-Thanks for your interest in contributing! GraphVisual is a large-scale graph theory toolkit with 158 source files, 116 test classes, and 74 documentation pages. This guide will help you navigate the codebase and contribute effectively.
+Thanks for your interest in contributing! GraphVisual is a large-scale graph theory toolkit with 175 source files, 133 test classes, and 74 documentation pages. This guide will help you navigate the codebase and contribute effectively.
 
 ## Table of Contents
 
@@ -90,7 +90,7 @@ GraphVisual/
 │   │   ├── gvisual/        # 158 source files — core library
 │   │   └── app/            # Data pipeline (DB → edge-list)
 │   ├── test/
-│   │   ├── gvisual/        # 116 test classes
+│   │   ├── gvisual/        # 129 test classes
 │   │   └── app/            # Pipeline utility tests
 │   ├── lib/                # JUNG 2.0.1, PostgreSQL JDBC, Commons IO
 │   └── images/             # UI icons and legend assets
@@ -335,7 +335,7 @@ java -cp "build/classes:build/test/classes:$(find lib -name '*.jar' | tr '\n' ':
 # Run all tests (use a test runner or list all test classes)
 ```
 
-The test suite has **116 test classes** covering most analyzers and exporters. CI runs a subset against JDK 11 and 17 — see `.github/workflows/ci.yml` for the canonical list.
+The test suite has **133 test classes** (~4,640+ `@Test` methods) covering most analyzers and exporters. CI runs a subset against JDK 11 and 17 — see `.github/workflows/ci.yml` for the canonical list.
 
 ### Docker
 

README.md

@@ -24,7 +24,7 @@ Built with Java and [JUNG](http://jung.sourceforge.net/) (Java Universal Network
 [![57 Analyzers](https://img.shields.io/badge/Analyzers-57-blueviolet)](ALGORITHMS.md)
 [![Publish](https://github.com/sauravbhattacharya001/GraphVisual/actions/workflows/publish.yml/badge.svg)](https://github.com/sauravbhattacharya001/GraphVisual/actions/workflows/publish.yml)
 [![Dependabot](https://img.shields.io/badge/Dependabot-enabled-025E8C?logo=dependabot)](https://github.com/sauravbhattacharya001/GraphVisual/blob/master/.github/dependabot.yml)
-[![2500+ Tests](https://img.shields.io/badge/Tests-2500%2B-brightgreen)](Gvisual/test/)
+[![4,600+ Tests](https://img.shields.io/badge/Tests-4600%2B-brightgreen)](Gvisual/test/)
 [![Platform](https://img.shields.io/badge/Platform-Windows%20%7C%20macOS%20%7C%20Linux-informational)](https://github.com/sauravbhattacharya001/GraphVisual)
 [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](https://github.com/sauravbhattacharya001/GraphVisual/pulls)
 [![Maintained](https://img.shields.io/badge/Maintained-yes-green.svg)](https://github.com/sauravbhattacharya001/GraphVisual/commits/master)
@@ -66,7 +66,7 @@ The tool was developed for research on **social network analysis** — specifica
 
 ## Architecture
 
-GraphVisual consists of 145 source classes (~55,000+ lines of production code, 100,000+ total with tests), 57 graph analyzers, and a Bluetooth-to-graph data pipeline. See **[ARCHITECTURE.md](ARCHITECTURE.md)**, **[ALGORITHMS.md](ALGORITHMS.md)**, and **[TESTING.md](TESTING.md)** for full details including the analyzer reference table, design patterns, dependency map, and testing guide.
+GraphVisual consists of 175 source classes (~55,000+ lines of production code, 100,000+ total with tests), 58 graph analyzers, and a Bluetooth-to-graph data pipeline. See **[ARCHITECTURE.md](ARCHITECTURE.md)**, **[ALGORITHMS.md](ALGORITHMS.md)**, and **[TESTING.md](TESTING.md)** for full details including the analyzer reference table, design patterns, dependency map, and testing guide.
 
 ```
 Gvisual/src/
@@ -172,7 +172,7 @@ Gvisual/src/
     ├── Network.java, Util.java, findMeetings.java, addLocation.java, matchImei.java
 ```
 
-100 test classes with **2,500+ tests** cover all analyzers and utilities.
+133 test classes with **4,600+ tests** cover all analyzers and utilities.
 
 ## Requirements
 
@@ -277,7 +277,7 @@ All thresholds are adjustable at runtime via the Category Panel sliders.
 
 ## Testing
 
-The test suite includes **106 test classes** with **2,100+ tests** covering analyzers, exporters, layouts, and utilities.
+The test suite includes **133 test classes** with **4,600+ tests** covering analyzers, exporters, layouts, and utilities.
 
 ```bash
 # Run all tests

TESTING.md

@@ -25,8 +25,8 @@ mvn test -Dsurefire.useFile=false
 
 | Metric | Value |
 |--------|-------|
-| Test classes | 106 (+ 2 in `app/`) |
-| Total tests | ~2,100+ |
+| Test classes | 129 (+ 4 in `app/`) |
+| Total tests | ~4,640+ (`@Test` methods) |
 | Framework | JUnit 4 |
 | Source directory | `Gvisual/test/` |
 | Coverage areas | Analyzers, exporters, layouts, utilities, GUI controllers |
@@ -41,13 +41,14 @@ The tests are configured via Maven Surefire in `pom.xml`:
 
 ```
 Gvisual/test/
-├── gvisual/                   # 106 test classes for core library
+├── gvisual/                   # 129 test classes for core library
 │   ├── ArticulationPointAnalyzerTest.java
 │   ├── BipartiteAnalyzerTest.java
 │   ├── ...
 │   └── TopologicalSortAnalyzerTest.java
-└── app/                       # 2 test classes for data pipeline
+└── app/                       # 4 test classes for data pipeline
     ├── ThresholdConfigTest.java
+    ├── UtilMethodsTest.java
     └── UtilTest.java
 ```
 
@@ -127,15 +128,17 @@ public void testSummaryNotEmpty() {
 
 ## Classes Without Tests
 
-The following 40 source classes in `gvisual/` do not have dedicated test classes. Contributions welcome:
+The following 28 source classes in `gvisual/` do not yet have dedicated test classes in `Gvisual/test/gvisual/`. Contributions welcome:
 
-**Exporters:** `AdjacencyListExporter`, `CentralityRadarExporter`, `DimacsExporter`, `GraphDiffHtmlExporter`, `GraphMatrixExporter`, `GraphStorytellerExporter`, `GraphTimelineExporter`, `NetworkFlowExporter`, `TikzExporter`
+**Exporters:** `CentralityRadarExporter`, `GraphDiffHtmlExporter`, `GraphMatrixExporter`, `GraphStorytellerExporter`, `GraphTimelineExporter`, `TikzExporter`
 
 **GUI Controllers:** `ArticulationPanelController`, `CentralityPanelController`, `CommunityPanelController`, `EgoPanelController`, `ExportActions`, `MSTPanelController`, `PathPanelController`, `ResiliencePanelController`, `StatsPanel`, `ToolbarBuilder`, `Main`, `RandomGraphDialog`
 
-**Analyzers:** `GraphComplementAnalyzer`, `GraphCompressor`, `GraphDegreeSequenceRandomizer`, `GraphDrawingQualityAnalyzer`, `GraphHealthChecker`, `GraphLayoutComparer`, `GraphMotifFinder`, `GraphProductCalculator`, `GraphRegularityAnalyzer`, `GraphSpectrumAnalyzer`, `GraphStatsDashboard`, `GraphVoronoiPartitioner`
+**Analyzers:** `GraphCompressor`, `GraphDrawingQualityAnalyzer`, `GraphLayoutComparer`, `GraphRegularityAnalyzer`, `GraphSpectrumAnalyzer`, `GraphStatsDashboard`, `GraphVoronoiPartitioner`
 
-**Utilities/Models:** `AdjacencyMatrixHeatmap`, `AnalysisResult`, `EdgeType`, `GraphRenderers`, `QuadTree`, `RandomGraphGenerator`, `SpectralLayout`
+**Utilities/Models:** `AdjacencyMatrixHeatmap`, `GraphRenderers`, `SpectralLayout`
+
+> Some of these classes also have skeleton tests under `Gvisual/src/test/gvisual/` that are not yet wired into the Surefire test source tree (`Gvisual/test/`). Promoting those into `Gvisual/test/gvisual/` (and fixing any drift against the current production APIs) is a good first contribution.
 
 ## Writing New Tests