Eu notei um problema estranho. Eu sou capaz de executar meus casos de teste usando Junit, mas quando estou executando usando maven Um dos casos de teste está falhando. Está reclamando que Gson classe def não foi encontrado.

Eu sou capaz de ver o jar do Gson nas dependências do Maven.

Então, eu duvidei que o classpath não incluísse o Gson. Então eu corri o maven com -X e notei algumas pistas.

[DEBUG] Could not find metadata com.example.libraries:Symbology:1.0.0-SNAPSHOT/maven-metadata.xml in local (C:\Users\ra\.m2\repository)
[DEBUG] Skipped remote update check for com.example.libraries:Symbology:1.0.0-SNAPSHOT/maven-metadata.xml, locally cached metadata up-to-date.
[DEBUG] Could not find metadata com.example.libraries:Symbology:1.0.0-SNAPSHOT/maven-metadata.xml in local (C:\Users\ra\.m2\repository)
[DEBUG] Skipped remote update check for com.example.libraries:Symbology:1.0.0-SNAPSHOT/maven-metadata.xml, locally cached metadata up-to-date.
[WARNING] The POM for com.example.libraries:Symbology:jar:1.0.0-SNAPSHOT is invalid, transitive dependencies (if any) will not be available: 2 problems were encountered while building the effective model for com.example.libraries:Symbology:1.0.0-SNAPSHOT
[ERROR] 'dependencies.dependency.artifactId' for ::jar is missing. @ 
[ERROR] 'dependencies.dependency.groupId' for ::jar is missing. @ 

Eu tenho um projeto que depende do projeto Symbology e este, por sua vez, usa o Gson. Mas agora, a partir desse log, vejo que as dependências transitivas não estão sendo incluídas. Então a classe Gson não está sendo encontrada.

Aqui está a simbologia pom:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<groupId>com.example.libraries</groupId>
<artifactId>Symbology</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>jar</packaging>

<name>Symbology</name>
<url>http://maven.apache.org</url>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.10</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>com.google.code.gson</groupId>
        <artifactId>gson</artifactId>
        <version>2.1</version>
    </dependency>
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.16</version>
    </dependency>
</dependencies>

Aqui está o Pom do meu projeto que está chamando simbologia:

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<groupId>com.example.libraries</groupId>
<artifactId>FGF</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>jar</packaging>
<distributionManagement>
    <snapshotRepository>
        <id>example.com</id>
        <name>example.com-snapshots</name>
        <url>http://example/artifactory/libs-snapshots-local</url>
    </snapshotRepository>
</distributionManagement>

<name>FGF</name>
<url>http://maven.apache.org</url>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<dependencies>

    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.10</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.16</version>
    </dependency>
    <dependency>
        <groupId>com.example.libraries</groupId>
        <artifactId>Category</artifactId>
        <version>1.0.0-SNAPSHOT</version>
    </dependency>
    <dependency>
        <groupId>com.example.libraries</groupId>
        <artifactId>Time</artifactId>
        <version>1.0.0-SNAPSHOT</version>
    </dependency>
    <dependency>
        <groupId>com.example.libraries</groupId>
        <artifactId>Display</artifactId>
        <version>1.0.0-SNAPSHOT</version>
    </dependency>
    **<dependency>
        <groupId>com.example.libraries</groupId>
        <artifactId>Symbology</artifactId>
        <version>1.0.0-SNAPSHOT</version>
    </dependency>**
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>3.2.0.BUILD-SNAPSHOT</version>
    </dependency>
    <dependency>
        <groupId>cglib</groupId>
        <artifactId>cglib</artifactId>
        <version>2.2.2</version>
    </dependency>
    <dependency>
        <groupId>org.apache.directory.studio</groupId>
        <artifactId>org.apache.commons.lang</artifactId>
        <version>2.6</version>
    </dependency>       

</dependencies>