0x0 matrix
==========

No loops
--------

directed: true
vcount: 0
edges: {
}

Loops once
----------

directed: true
vcount: 0
edges: {
}

Loops twice
-----------

directed: true
vcount: 0
edges: {
}

IGRAPH_ADJ_DIRECTED
===================

No loops
--------

directed: true
vcount: 4
edges: {
0 1: 1
0 2: 2
1 0: 2
1 3: 1
3 1: 1
}

Loops once
----------

directed: true
vcount: 4
edges: {
0 1: 1
0 2: 2
1 0: 2
1 3: 1
2 2: 4
3 1: 1
}

Loops twice
-----------

directed: true
vcount: 4
edges: {
0 1: 1
0 2: 2
1 0: 2
1 3: 1
2 2: 2
3 1: 1
}

IGRAPH_ADJ_UPPER
================

No loops
--------

directed: false
vcount: 4
edges: {
1 0: 1
2 0: 2
3 1: 1
}

Loops once
----------

directed: false
vcount: 4
edges: {
1 0: 1
2 0: 2
3 1: 1
2 2: 4
}

Loops twice
-----------

directed: false
vcount: 4
edges: {
1 0: 1
2 0: 2
3 1: 1
2 2: 2
}

IGRAPH_ADJ_LOWER
================

No loops
--------

directed: false
vcount: 4
edges: {
1 0: 2
3 1: 1
}

Loops once
----------

directed: false
vcount: 4
edges: {
1 0: 2
2 2: 4
3 1: 1
}

Loops twice
-----------

directed: false
vcount: 4
edges: {
1 0: 2
2 2: 2
3 1: 1
}

IGRAPH_ADJ_MIN
==============

No loops
--------

directed: false
vcount: 4
edges: {
1 0: 1
3 1: 1
}

Loops once
----------

directed: false
vcount: 4
edges: {
1 0: 1
3 1: 1
2 2: 4
}

Loops twice
-----------

directed: false
vcount: 4
edges: {
1 0: 1
3 1: 1
2 2: 2
}

IGRAPH_ADJ_MAX
==============

No loops
--------

directed: false
vcount: 4
edges: {
1 0: 2
2 0: 2
3 1: 1
}

Loops once
----------

directed: false
vcount: 4
edges: {
1 0: 2
2 0: 2
3 1: 1
2 2: 4
}

Loops twice
-----------

directed: false
vcount: 4
edges: {
1 0: 2
2 0: 2
3 1: 1
2 2: 2
}

IGRAPH_ADJ_UNDIRECTED
==============

No loops
--------

directed: false
vcount: 4
edges: {
1 0: 2
2 0: 2
3 1: 1
}

Loops once
----------

directed: false
vcount: 4
edges: {
1 0: 2
2 0: 2
3 1: 1
2 2: 4
}

Loops twice
-----------

directed: false
vcount: 4
edges: {
1 0: 2
2 0: 2
3 1: 1
2 2: 2
}

IGRAPH_ADJ_PLUS
===============

No loops
--------

directed: false
vcount: 4
edges: {
1 0: 3
2 0: 2
3 1: 2
}

Loops once
----------

directed: false
vcount: 4
edges: {
1 0: 3
2 0: 2
3 1: 2
2 2: 4
}

Loops twice
-----------

directed: false
vcount: 4
edges: {
1 0: 3
2 0: 2
3 1: 2
2 2: 2
}

Check handling of non-square matrix error.
Check handling of invalid adjacency mode.
Check error for 0x1 matrix.
Check error for non-symmetric matrix and IGRAPH_ADJ_UNDIRECTED.
